Edward wilkes rathbijn



(No Model.) A

E. W. RATHBUN( KILN POR MAKING GHARGOAL.

Patented Oct. 22, 1889.

N. PETERS. mmuthvgrnphar, wnmngton. D. C.

UNITED j f STATES i PATENT "FFrcE-.i-

EDWARD witkns RATHBUN, or DEsEnoN'ro, ONTARIO, CANADA.

KILN FOR MAKING cHARooAL.

' SPECIFICATION forming part of Letters Patent No. 413,306, dated october 22, 1889. l Application led March 22, 1887. Serial No. 231,940. (No model.) Patented in Canada April 2, 1887, No. 26,365.

To all whom it may concern: y

Be it known that I, EDWARD WILKns RATH- BN,'lumber merchant, a subject of the Queen of Great Britain, and residing in the village of Deseronto, in the county of Hastings, in the Province of Ontario, Canada, have invented certain new and useful Improvements` plan of the same.

The invention consists in kilns for making charcoal, constructed in Asuch manner that the gases evolved during the operation may be drawn oif and utilized and at same time give facilities for regulating the draft and controlling the combustion within the kiln, so as to thoroughly and completely char the contents.

In Figs. l and 2, A represents the kiln, which by preference is built in the form shown, with the wall of brick or other `suitable building material capable of withstanding the action of heat. l Y v F are iiues arranged in the wall of the kiln, and have lateral'branches at the bottom and extending into the coke-chamber at different height from the iioor thereof, so that the evolved gases can be drawn from any desired place above thev level of the door. These branch iiues F are provided with valves E to control and regulate the flow of gas from the chamber into the flues. The upper ends of the flue F open into the chamber C, which receives the gases and passes them to a pipe D, leading to a condenser C.

bottom of the kiln and at intervals through# out its circumference. t

B is a chamber with perforated walls built These valves may be placed at various heights from the ring operation is going on and throu air may be admitted.

glrwhich y 5 o .y

J is a pipe to` convey gas` back from the condenser to the chamber B. I

I-I is a pipe connected to J, and through which air may be blown from a fan in such manner as to form a jet of air and gas discharging into chamber B; or H may be used to inject steam, so as to discharge into B a jet of gas and steam.

K is the opening into the kiln, and which during the charring process is closed either` by means of iron doors or by a `temporary brick wall.

The following is the method ofoperating the kiln. By means of the door K the kiln may be filled with wood or other material to y be charred. The door is then closed or built up and fire lighted in the chamber BV or the.

passage G. A draftl is obtained from the chamber B through the kiln into the chamber C by means of the iues F F F, dto. The dichamber C the pipe D leads the gases to a i condensing' apparatus or to yany required point.

chamber or in the passage G.

By means of pipe J the gas may be returned or a portion of it maybe returned l I am aware that charcoal-kilns have been l pro vided with means for taking out the gases and conveying them to a condenser,fromwhich theyare returned to the combustion-chamber of the kiln, and that I do not broadly claim.

the formation of the charcoal by rapidly with- Y drawingthe gases Without adding to the draft.

denser and then returned to the combustion-A gases from said fluesand having apipe lead-A ing to the condenser, the perforated combustion-chamber B, having passage G, and a pipe J, to convey gas from the condenser to the combustion-chamber, substantially as described. ,Y

2. In a kiln for making charcoal, in which the gases are conveyed from the kiln to a con- .chamber of the kiln, the combination of the Walls provided With flues beginning near the bottom of the kiln and terminating near the ktop thereof, and provided with a series of valves near the loWer ends, a chamber C for re-.

ceiving the gases from said ues and having pipe D leading to the condenser, the perforated colnbustion-chamber B, having passage G, and a pipe J to convey gas from the condenser to the combustion-chamber, substantially as described.

3. In a kiln for making charcoal, in which the gases are conveyed to a condenser and then returned to the combustion-chamber of the kiln, the combination of the Walls pro-V vided with l iiues beginning near the bottom of the kiln and terminating near the top thereof, a chamber C for receiving the gases from said fines and having a pipe Dy leading to the condenser, the perforated combustionchamber B, having passage G, a pipe J, leading from .the condenser tothe combnstion-cham ber, and the pipe H, for the purpose set forth.

' Deseronto, Ontario, lst February, 1887.

EDWARD WILKES RATHBUN.

Witnesses:

l WM. RAYLSWORTH,

F. S. RATHBUN. 

